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Gates K040440 - Serpentine Belt
Product Overview
The Gates Serpentine Belt K040440 is a crucial component designed specifically for your Audi's engine system. With its premium-grade construction and engineering, this belt ensures reliable and efficient performance under various operating conditions. Crafted to meet or exceed OEM standards, the K040440 serpentine belt features a high-strength tensile cord that provides exceptional durability and resistance to wear and tear. Its advanced material composition eliminates the risk of cracking and tearing, ensuring longevity and reliability for your vehicle's engine. Engineered for optimal power transmission, the Gates Serpentine Belt delivers smooth and consistent power flow to all engine components. Its innovative design reduces slippage, enhancing energy efficiency and minimizing noise levels during operation. Installation is straightforward, making it a hassle-free upgrade for DIY enthusiasts and professionals alike. Whether you're replacing a worn-out belt or looking to enhance your Audi's performance, the Gates Serpentine Belt K040440 is the perfect choice. Choose Gates K040440 for dependable performance and peace of mind every time you service your vehicle.
Cross Reference Numbers
This Gates K040440 is equivalent to or replaces the following part numbers: 4K440, GT4040440, GTK040440, 440K4, 164448, 4PK1120, 440K4, K040440, K4404, 4040440, PK040440, 4040440, 440K4MK, K040440, 440K4, A-440K4, 06M260849L.
Vehicle Compatibility
This part fits some of the popular models below. For Fitment Confidence, please use the vehicle selector tool above to verify exact compatibility.
- Audi S4 3.0 V6 (2018–2021)
- Audi S5 3.0 V6 (2018–2021)
- Audi S5 Sportback 3.0 V6 (2018–2021)
- Audi SQ5 3.0 V6 (2018–2021)
- Audi SQ5 Sportback 3.0 V6 (2021)
This may also fit other applications. Please use the vehicle selector tool to verify fitment.
Why Shop at eEuroparts.com?
- Proven Expertise: Over 25 years of experience with European vehicles means we know your car inside and out.
- Exclusive Kits That Fitâ„¢ - complete repair solutions with no guesswork
- Fitment Confidence: Our accurate cataloging ensures you get the right part the first time.
- Fast, Reliable Shipping: Orders ship quickly from our U.S.-based warehouses.
- Transparent Pricing: Competitive prices with no hidden fees or surprise charges.
- Established Trust: Serving the European auto community since 2000.
Frequently Asked Questions
What does the Gates K040440 serpentine belt do?
The serpentine belt plays a vital role in your vehicle's engine system by driving multiple peripheral devices such as the alternator, power steering pump, and air conditioning compressor. It ensures that these components operate smoothly and efficiently.
How do I know if my serpentine belt needs replacement?
Common signs that your serpentine belt may need replacement include squeaking or squealing noises, visible wear such as cracks or fraying, loss of power steering, or overheating engine due to failed accessory drives.
Can I install the Gates K040440 myself?
Yes, the Gates K040440 serpentine belt can be installed by DIY enthusiasts. Ensure you have the correct tools and follow safety precautions during the installation process.
What are the symptoms of a faulty serpentine belt?
Symptoms of a faulty serpentine belt include squealing noises, loss of power steering, overheating engine, and malfunctioning electrical components. If you notice these issues, it may be time to check the belt for wear or damage.
Why should I choose Gates for my serpentine belt needs?
Gates is known for its quality and reliability in automotive parts. Order Gates K040440 today for a factory-correct replacement that restores safety and performance.
Note: All information on this page and in the FAQ is for general reference only. Verify fitment and consult a professional as needed. eEuroparts.com is not responsible for incorrect part selection or installation.
- BrandGates
- ManufacturerGates
- MPNK040440
- Part TypeSerpentine Belt
- OE Part NumbersMD368858, MD188826, 9936481120, 117200N502, 31110P0GA02, 4668249AC, 9936421120, 4668249AB, 117200N500, 06M260849L, A17200N502, MD199826
- Cross Reference NumbersK4404, 4K1120, 4K440, 4PK1123, 440K4, 77-9373-0, 7793730, 164448, 4PVK1120, A-440K4, A440K4, 404-0440, 4040440, GT4040440, 201662, 5040440, 439K4, K040440, 9194011207, 10022532, 292068, C9132, 7700260887, 14-0855-4, 1408554, JK4-446, JK4446, 14083320, 200825, SOA332Z347, 77-9374-8, 7793748, 203206, 5040440DR, 5040439, 4K440AP, 4PK1120, 203611, 2X111945, 9194011202, 440K4MK, 506019109, 204325, 2X106034, GTK040440, PK040440, 25-71114, 2571114, QJK4445, 203264, 1040440, 25-040440, 25040440, 5040439DR, 73036GA110
- FeaturesCord Material : Polyester
Cross Section Designation : K
Effective Length : 1121
Effective Length : 44.125
Grade Type : OE Performance
Material : EPDM
Outside Circumference : 1133
Outside Circumference : 44.625
Rib Quantity : 4
Top Width : .56
Top Width : 14
Type : Automotive V-Ribbed Belt (Standard)
- Fitment
- Fitment TypeVehicle Specific
| Year | Make | Model | Submodel | Notes |
|---|---|---|---|---|
| 2024 | Audi | S5 | Premium (3.0 V6 GAS) | |
| 2024 | Audi | S5 | Premium Plus (3.0 V6 GAS) | |
| 2024 | Audi | S5 | Prestige (3.0 V6 GAS) | |
| 2024 | Audi | S5 Sportback | Premium (3.0 V6 GAS) | |
| 2024 | Audi | S5 Sportback | Premium Plus (3.0 V6 GAS) | |
| 2024 | Audi | S5 Sportback | Prestige (3.0 V6 GAS) | |
| 2024 | Audi | SQ5 | Premium (3.0 V6 GAS) | |
| 2024 | Audi | SQ5 | Premium Plus (3.0 V6 GAS) | |
| 2024 | Audi | SQ5 | Prestige (3.0 V6 GAS) | |
| 2024 | Audi | SQ5 Sportback | Premium (3.0 V6 GAS) | |
| 2024 | Audi | SQ5 Sportback | Premium Plus (3.0 V6 GAS) | |
| 2024 | Audi | SQ5 Sportback | Prestige (3.0 V6 GAS) | |
| 2023 | Audi | S4 | Premium (3.0 V6 GAS) | |
| 2023 | Audi | S4 | Premium Plus (3.0 V6 GAS) | |
| 2023 | Audi | S4 | Prestige (3.0 V6 GAS) | |
| 2023 | Audi | S5 | Premium (3.0 V6 GAS) | |
| 2023 | Audi | S5 | Premium Plus (3.0 V6 GAS) | |
| 2023 | Audi | S5 | Prestige (3.0 V6 GAS) | |
| 2023 | Audi | S5 Sportback | Premium (3.0 V6 GAS) | |
| 2023 | Audi | S5 Sportback | Premium Plus (3.0 V6 GAS) | |
| 2023 | Audi | S5 Sportback | Prestige (3.0 V6 GAS) | |
| 2023 | Audi | SQ5 | Premium (3.0 V6 GAS) | |
| 2023 | Audi | SQ5 | Premium Plus (3.0 V6 GAS) | |
| 2023 | Audi | SQ5 | Prestige (3.0 V6 GAS) | |
| 2023 | Audi | SQ5 Sportback | Premium (3.0 V6 GAS) | |
| 2023 | Audi | SQ5 Sportback | Premium Plus (3.0 V6 GAS) | |
| 2023 | Audi | SQ5 Sportback | Prestige (3.0 V6 GAS) | |
| 2022 | Audi | S4 | Premium (3.0 V6 GAS) | |
| 2022 | Audi | S4 | Premium Plus (3.0 V6 GAS) | |
| 2022 | Audi | S4 | Prestige (3.0 V6 GAS) | |
| 2022 | Audi | S5 | Premium (3.0 V6 GAS) | |
| 2022 | Audi | S5 | Premium Plus (3.0 V6 GAS) | |
| 2022 | Audi | S5 | Prestige (3.0 V6 GAS) | |
| 2022 | Audi | S5 Sportback | Premium (3.0 V6 GAS) | |
| 2022 | Audi | S5 Sportback | Premium Plus (3.0 V6 GAS) | |
| 2022 | Audi | S5 Sportback | Prestige (3.0 V6 GAS) | |
| 2022 | Audi | SQ5 | Premium (3.0 V6 GAS) | |
| 2022 | Audi | SQ5 | Premium Plus (3.0 V6 GAS) | |
| 2022 | Audi | SQ5 | Prestige (3.0 V6 GAS) | |
| 2022 | Audi | SQ5 Sportback | Premium (3.0 V6 GAS) | |
| 2022 | Audi | SQ5 Sportback | Premium Plus (3.0 V6 GAS) | |
| 2022 | Audi | SQ5 Sportback | Prestige (3.0 V6 GAS) | |
| 2021 | Audi | S4 | Premium (3.0 V6 GAS) | |
| 2021 | Audi | S4 | Premium Plus (3.0 V6 GAS) | |
| 2021 | Audi | S4 | Prestige (3.0 V6 GAS) | |
| 2021 | Audi | S5 | Premium (3.0 V6 GAS) | |
| 2021 | Audi | S5 | Premium Plus (3.0 V6 GAS) | |
| 2021 | Audi | S5 | Prestige (3.0 V6 GAS) | |
| 2021 | Audi | S5 Sportback | Premium (3.0 V6 GAS) | |
| 2021 | Audi | S5 Sportback | Premium Plus (3.0 V6 GAS) | |
| 2021 | Audi | S5 Sportback | Prestige (3.0 V6 GAS) | |
| 2021 | Audi | SQ5 | Premium (3.0 V6 GAS) | |
| 2021 | Audi | SQ5 | Premium Plus (3.0 V6 GAS) | |
| 2021 | Audi | SQ5 | Prestige (3.0 V6 GAS) | |
| 2021 | Audi | SQ5 Sportback | Premium (3.0 V6 GAS) | |
| 2021 | Audi | SQ5 Sportback | Premium Plus (3.0 V6 GAS) | |
| 2021 | Audi | SQ5 Sportback | Prestige (3.0 V6 GAS) | |
| 2020 | Audi | S4 | Premium (3.0 V6 GAS) | |
| 2020 | Audi | S4 | Premium Plus (3.0 V6 GAS) | |
| 2020 | Audi | S4 | Prestige (3.0 V6 GAS) | |
| 2020 | Audi | S5 | Premium (3.0 V6 GAS) | |
| 2020 | Audi | S5 | Premium Plus (3.0 V6 GAS) | |
| 2020 | Audi | S5 | Prestige (3.0 V6 GAS) | |
| 2020 | Audi | S5 Sportback | Premium (3.0 V6 GAS) | |
| 2020 | Audi | S5 Sportback | Premium Plus (3.0 V6 GAS) | |
| 2020 | Audi | S5 Sportback | Prestige (3.0 V6 GAS) | |
| 2020 | Audi | SQ5 | Premium (3.0 V6 GAS) | |
| 2020 | Audi | SQ5 | Premium Plus (3.0 V6 GAS) | |
| 2020 | Audi | SQ5 | Prestige (3.0 V6 GAS) | |
| 2019 | Audi | S4 | Premium (3.0 V6 GAS) | |
| 2019 | Audi | S4 | Premium Plus (3.0 V6 GAS) | |
| 2019 | Audi | S4 | Prestige (3.0 V6 GAS) | |
| 2019 | Audi | S5 | Premium (3.0 V6 GAS) | |
| 2019 | Audi | S5 | Premium Plus (3.0 V6 GAS) | |
| 2019 | Audi | S5 | Prestige (3.0 V6 GAS) | |
| 2019 | Audi | S5 Sportback | Premium Plus (3.0 V6 GAS) | |
| 2019 | Audi | S5 Sportback | Prestige (3.0 V6 GAS) | |
| 2019 | Audi | SQ5 | Premium (3.0 V6 GAS) | |
| 2019 | Audi | SQ5 | Premium Plus (3.0 V6 GAS) | |
| 2019 | Audi | SQ5 | Prestige (3.0 V6 GAS) | |
| 2018 | Audi | S4 | Premium Plus (3.0 V6 GAS) | |
| 2018 | Audi | S4 | Prestige (3.0 V6 GAS) | |
| 2018 | Audi | S5 | Premium Plus (3.0 V6 GAS) | |
| 2018 | Audi | S5 | Prestige (3.0 V6 GAS) | |
| 2018 | Audi | S5 Sportback | Premium Plus (3.0 V6 GAS) | |
| 2018 | Audi | S5 Sportback | Prestige (3.0 V6 GAS) | |
| 2018 | Audi | SQ5 | Premium Plus (3.0 V6 GAS) | |
| 2018 | Audi | SQ5 | Prestige (3.0 V6 GAS) |
Warranty Overview
At eEuroparts, we stand behind the quality of the products we sell. Every part we offer is backed by a warranty designed to give you peace of mind and protect your investment.
Standard Warranty – Most Parts
Coverage: 2 years or 24,000 miles (whichever comes first) from purchase date.
Protection: Defects in materials or workmanship under normal personal use.
Eligibility: Applies only to the original purchaser and the vehicle where the part was first installed.
Exclusions:
Wear-and-tear items (brake pads, filters, bulbs, wipers, etc.)
Commercial, fleet, rideshare, off-road, or racing use
Improper installation, misuse, accidents, or modifications
Not Covered: Labor, shipping, towing, or incidental costs.
Bison Performance Warranty – Our House Brand
Coverage: Limited Lifetime Warranty for as long as you own your vehicle.
Applies To: All products sold under the Bison Performance label.
Premium Protection: Goes beyond our standard warranty — if it’s a Bison product, the 2-year/24k mile limit is replaced with lifetime coverage.
Exclusions: Same as the standard warranty (normal wear, commercial use, improper installation, etc.).
What’s Included: Replacement of the defective product (labor and shipping excluded).
Warranty Claim Requirements
To keep claims fast and fair, we require:
Proof of purchase (invoice or order confirmation).
Photos or videos showing the defective part, order number, date, VIN, and odometer reading.
Diagnostic reports or part returns for non-visible issues may be requested.
Claims must be truthful, properly documented, and reflect normal consumer use.
Buy With Confidence: We back our products because we believe in their quality, with a transparent, customer-first warranty process you can trust. And with Bison Performance products, you’ll enjoy Limited Lifetime protection—an assurance few brands can match.
For full details and exclusions, please see our complete Warranty Terms & Conditions.
This summary is for convenience only. For full warranty coverage details, exclusions, and requirements, see our official Warranty Terms & Conditions. In case of conflict, the full policy governs.
Return Policy Overview
Most parts can be returned within 30 days of delivery if unused, uninstalled, and in original packaging.
To start a return, contact customer support via Chat or Contact Us.
Restocking fee: Up to 20% may apply for certain orders (buyer’s remorse, order errors, or special-order items)
Refunds: Issued to your original payment method within 3–5 business days after inspection
Exchanges: Not automatic — please return and reorder
Replacements: May be approved for incorrect or defective items reported within 7 days
Not returnable:
Used or installed parts
Electrical components
Opened filter kits, gaskets, or contaminated items
Final sale or custom orders
Important Notes:
Return shipping is your responsibility unless we made a verified error
Fitment is the customer’s responsibility (we can assist, but do not guarantee)
Country of origin may vary and is not grounds for return
For complete details, please see our full Return Policy.
This Returns summary is provided for convenience only. All returns, refunds, and exchanges are subject to the complete Returns Policy. In the event of any conflict, the full policy governs.
Fast, Reliable Shipping — Straight to Your Door
We ship most orders the same day when placed before 2 PM CST (Monday–Friday). Our main warehouse is just east of Nashville, TN, and we also ship from multiple locations nationwide to get your order to you as quickly as possible.
We use trusted carriers like UPS, FedEx, and USPS.
Tracking info is emailed to you as soon as your order ships.
Delivery estimates at checkout are based on carrier data, but not guaranteed.
Need help with a shipment?
If your order is missing, damaged, or incorrect, just let us know within 5 days of delivery. We’ll walk you through the quick claim process — including a few photos to help us make things right.
For complete details, please see our full Shipping Policy.
This Shipping summary is provided for convenience only. Delivery times, carrier terms, fees, restrictions, risk of loss, and other details are governed by our complete Shipping Policy. In the event of any conflict, the full policy governs.







